package com.ruoyi.webs.utils.weixinlogin;

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.Arrays;

public class SignUtil {
    private static String token = "bkszlv";


    public static boolean checkSignature(String signature, String timestamp, String nonce) {
        String[] arr = {token, timestamp, nonce};
        System.out.println("12341234312");

        Arrays.sort((Object[]) arr);
        StringBuilder content = new StringBuilder();
        for (int i = 0; i < arr.length; i++) {
            content.append(arr[i]);
        }
        MessageDigest md = null;
        String tmpStr = null;

        try {
            md = MessageDigest.getInstance("SHA-1");

            byte[] digest = md.digest(content.toString().getBytes());
            tmpStr = byteToStr(digest);
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        }

        content = null;

        return (tmpStr != null) ? tmpStr.equals(signature.toUpperCase()) : false;
    }


    private static String byteToStr(byte[] byteArray) {
        String strDigest = "";
        for (int i = 0; i < byteArray.length; i++) {
            strDigest = String.valueOf(strDigest) + byteToHexStr(byteArray[i]);
        }
        return strDigest;
    }


    private static String byteToHexStr(byte mByte) {
        char[] Digit = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F'};
        char[] tempArr = new char[2];
        tempArr[0] = Digit[mByte >>> 4 & 0xF];
        tempArr[1] = Digit[mByte & 0xF];

        String s = new String(tempArr);
        return s;
    }
}